... can be designed,just you send us your pictures,drawings or designs . 8.Silicone washers quality meet the SGS,FDA,MSDS ... ,White,Red,Yellow,Rusty,Blue,etc Size: 0.6mm-1200mm or as your needsTolerance:ISO 3302-1 M2Certificate:ISO/SGS(RoHS)/FDA ... (DHL,TNT,FEDEX),AirplaneQuality Control:Internal QC controlPacking:neutral packing or other packing according to your needs.Sample:Free Silicone Washers ...